Which statement accurately classifies helium?

A. it is an atom

B. It is a mixture

C. It is a molecule

D. It is a compound

Which is an advantage of AC over DC power? A. AC voltage can be transformed into other voltages through transformers. B. AC voltage is more easily used in the home. C. AC circuits are safer. D.

A sports car and a moving van are traveling at a speed of 30 km/h. Which vehicle will be easier to stop? Why?

On the moon, all free-fall distance functions are of the form s (t) = 0.81t^2 where t is in seconds and s is in meters. An object is dropped from a height of 200 meters above the moon. After 9 sec, consider parts (a) through (d) below.

The voltage across the primary winding is 6000 V. If the primary winding has 50 coils and the secondary winding has 20 coils, what is the secondary voltage?

45 m = how many cm?

The puzzle box is traditionally associated with the work of

A 0.95-kg sample of water at 11°C is in a calorimeter. You drop a piece of steel with a mass of 0.39 kg at 212°C into it.

Let the magnitudes of two displacement vectors be 4 m and 8 m, respectively. If the two vectors are added, the magnitude of the resultant vector. A. is exactly equal to 4 m. B. is exactly equal to 12 m. C. is greater than 12 m. D.

justin pushes basket of toys with 50N of force for 3 meters in 100 seconds. how much work did he do on the basket

In general, what can be said about metals.